package com.ruoyi.gateway.config;

import com.alibaba.fastjson2.JSON;
import com.ruoyi.common.core.domain.R;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Component;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Mono;

import java.util.Optional;

import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ORIGINAL_REQUEST_URL_ATTR;


/**
 * https://doc.ruoyi.vip/ruoyi-cloud/cloud/gateway.html#%E7%86%94%E6%96%AD%E9%99%8D%E7%BA%A7
 * 熔断降级处理
 */
// @Component
// public class HystrixFallbackHandler implements HandlerFunction<ServerResponse> {
//
//     private static final Logger log = LoggerFactory.getLogger(HystrixFallbackHandler.class);
//     @Override
//     public Mono<ServerResponse> handle(ServerRequest serverRequest) {
//         Optional<Object> originalUris = serverRequest.attribute(GATEWAY_ORIGINAL_REQUEST_URL_ATTR);
//         originalUris.ifPresent(originalUri -> log.error("网关执行请求:{}失败,hystrix服务降级处理", originalUri));
//         return ServerResponse.status(HttpStatus.INTERNAL_SERVER_ERROR.value()).contentType(MediaType.APPLICATION_JSON)
//                 .body(BodyInserters.fromValue(JSON.toJSONString(R.fail("服务已被降级熔断"))));
//     }
// }
